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Foldable accommodating intraocular lens

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Foldable accommodating intraocular lens


A foldable accommodating intraocular lens (AIOL) for implantation in a human eye, the AIOL including a hollow flattened sphere shaped housing including a shape memory optical element and a tubular casing mounted on the housing for reciprocation relative thereto for selectively compressing the shape memory optical element between a non-compressed shape and a compressed shape whereby the AIOL has a continuously variable Diopter strength
Related Terms: Elective Implant Implantation Intraocular Intraocular Lens Ocular Optic Flatten Ocular Lens Optical

USPTO Applicaton #: #20130018461 - Class: 623 637 (USPTO) - 01/17/13 - Class 623 
Prosthesis (i.e., Artificial Body Members), Parts Thereof, Or Aids And Accessories Therefor > Eye Prosthesis (e.g., Lens Or Corneal Implant, Or Artificial Eye, Etc.) >Intraocular Lens >Focal Power Of Lens Can Be Continuously Varied By Movement Of Body Part (e.g., Head, Eyes, Ciliary Muscles, Etc.)

Inventors: Joshua Ben Nun

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The Patent Description & Claims data below is from USPTO Patent Application 20130018461, Foldable accommodating intraocular lens.

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FIELD OF THE INVENTION

The invention pertains to accommodating intraocular lens assemblies.

BACKGROUND OF THE INVENTION

Commonly owned PCT International Application No. PCT/IL02/00693 entitled Accommodating Lens Assembly and published on Feb. 27, 2003 under PCT International Publication No. WO 03/015669 illustrates and describes accommodating intraocular lens (hereinafter AIOL) assemblies, the contents of which are incorporated herein by reference. The AIOL assemblies each include a haptics system adapted to be securely fixed in a human eye\'s annular ciliary sulcus at at least two spaced apart stationary anchor points so that it may act as a reference plane for an AIOL of continuously variable Diopter strength affected by a human eye\'s capsular diaphragm under control of its sphincter-like ciliary body and acting thereagainst from a posterior direction. The haptics systems include a rigid planar haptics plate with a telescoping haptics member for sliding extension. The haptics plate and the haptics member are preferably self-anchoring as illustrated and described in commonly owned PCT International Application No. PCT/IL02/00128 entitled Intraocular Lens and published on Aug. 29, 2002 under PCT International Publication No. WO 02/065951, the contents of which are incorporated herein by reference.

Commonly owned PCT International Application No. PCT/IL2005/000456 entitled Accommodating Intraocular Lens Assemblies and Accommodation Measurement Implant and published on Nov. 10, 2005 under PCT International Publication No. WO 2005/104994 illustrates and describes AIOL assemblies enabling post implantation in situ manual selective displacement of an AIOL along a human eye\'s visual axis relative to at least two spaced apart stationary anchor points to a desired position to ensure that an AIOL assumes a non-compressed state in a human eye\'s constricted ciliary body state. Such in situ manual selective displacement can be effected post implantation to correct for capsular contraction which is a natural reaction which typically develops over a few months following extraction of the contents of a human eye\'s natural crystalline lens, and also a subject\'s changing eyesight overtime with minimal clinical intervention. Such in situ manual selective displacement can be achieved as follows: First, a discrete haptics system for retaining a discrete AIOL which is manually displaceable relative thereto. And second, a haptics system with at least two haptics having radiation sensitive regions capable of undergoing plastic deformation for in situ manual displacement of an integrally formed AIOL.

Commonly owned PCT International Application No. PCT/IL2005/001069 entitled Accommodating Intraocular Lens (AIOL), and AIOL Assemblies Including Same illustrates and describes an AIOL including a biasing mechanism for elastically deforming an elastically deformable shape memory disk-like optical element for affording the AIOL a natural positive Diopter strength for near vision. The AIOL is intended to be implanted in a human eye such that relaxation of its ciliary body causes its capsular diaphragm to apply an external force for overcoming the biasing mechanism to reduce the AIOL\'s natural positive Diopter strength for distance vision.

Other AIOLs are illustrated and described in U.S. Pat. No. 4,254,509 to Tennant, U.S. Pat. No. 4,409,691 to Levy, U.S. Pat. No. 4,888,012 to Horn et al., U.S. Pat. No. 4,892,543 to Turley, U.S. Pat. No. 4,932,966 to Christie et al., U.S. Pat. No. 5,476,514 to Cumming, U.S. Pat. No. 5,489,302 to Skottun, U.S. Pat. No. 5,496,366 to Cumming, U.S. Pat. No. 5,522,891 to Klaas, U.S. Pat. No. 5,674,282 to Cumming, U.S. Pat. No. 6,117,171 to Skottun, U.S. Pat. No. 6,197,059 to Cumming, U.S. Pat. No. 6,299,641 to Woods, U.S. Pat. No. 6,342,073 to Cumming et al., U.S. Pat. No. 6,387,126 to Cumming, U.S. Pat. No. 6,406,494 to Laguette et al., U.S. Pat. No. 6,423,094 to Sarfarazi, U.S. Pat. No. 6,443,985 to Woods, U.S. Pat. No. 6,464,725 to Skotton, U.S. Pat. No. 6,494,911 to Cumming, U.S. Pat. No. 6,503,276 to Lang et al., U.S. Pat. No. 6,638,306 to Cumming, U.S. Pat. No. 6,645,245 to Preussner, U.S. patent Application Publication No. U.S. 2004/0169816 to Esch, and EP 1 321 112.

SUMMARY

OF THE INVENTION

One aspect of the present invention is directed towards accommodating intraocular (AIOL) assemblies each including at least one shape memory optical element resiliently elastically deformable between a non-compressed shape with a first Diopter strength and a compressed shape with a second Diopter strength different than its first Diopter strength such that an AIOL has a continuously variable Diopter strength between a minimum Diopter strength for distance vision purposes and a maximum Diopter strength for near vision purposes. The AIOL assemblies are intended for in situ manual selective displacement of an AIOL along a human eye\'s visual axis relative to stationary anchor points after implantation for enabling accurate AIOL deployment to take full advantage of the reciprocal movement of a human eye\'s capsular diaphragm between its constricted ciliary body position and its relaxed ciliary body position. Axial displacement may be over a continuous range in a similar manner to aforesaid WO 2005/104994 or alternatively at discrete axial stopping positions typically from about 100 μm to about 300 μm apart. Stepwise axial displacement is preferably enabled by a so-called “push and twist” bayonet arrangement similar to a conventional light bulb fitting having a single stopping position. The AIOL assemblies each include a haptics system also suitable for self-anchoring implantation of a fixed Diopter strength IOL in a human eye as opposed to an AIOL having a variable Diopter strength.

Another aspect of the present invention is directed towards AMU which lend themselves to be at least partially folded under reasonable forces as can be applied using conventional ophthalmic surgical tools, for example, tweezers, for facilitating insertion into a human eye through a relatively small incision. The AIOLs can be provided as discrete components for use with discrete haptics systems for enabling aforesaid in situ axial displacement. The discrete AIOLs are provided with typically two or more manipulation apertures accessible from an anterior side for receiving the tip of a handheld manipulation tool for enabling in situ manipulation. The manipulation apertures may be in the form of peripheral disposed manipulation rings, blind manipulation notches, and the like.

Alternatively, the AIOLs can be integrally formed with a haptics system including at least two elongated haptics having radiation sensitive regions capable of undergoing plastic deformation for enabling aforesaid in situ axial displacement.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to understand the invention and to see how it can be carried out in practice, preferred embodiments will now be described, by way of non-limiting examples only, with reference to the accompanying drawings in which similar parts are likewise numbered, and in which:

FIG. 1 is a cross section view of an anterior part of a human eye in its natural near vision condition in an axial plane of the human body;

FIG. 2 is a cross section view of an anterior part of a human eye in its natural distance vision condition in an axial plane of the human body;

FIG. 3 is a pictorial view of a disassembled “push and twist” AIOL assembly including a discrete haptics system and a discrete AIOL with a flattened spherical shaped housing a shape memory optical element;

FIG. 4 is a close-up front view of a bifurcated attachment plate of FIG. 3\'s haptics system;

FIG. 5 is a pictorial view of a stepped track of FIG. 3\'s haptics system;

FIG. 6 is a pictorial view of a FIG. 3\'s AIOL being folded by tweezers for insertion into a human eye through a small incision;

FIG. 7 is a pictorial view of a unitary AIOL assembly including a haptics system integrally formed with FIG. 3\'s AIOL;

FIG. 8 is a longitudinal cross section view of the FIG. 3\'s AIOL in its non-compressed state along line B-B in FIG. 3;

FIG. 9 is a longitudinal cross section of FIG. 3\'s AIOL in its compressed state along line B-B in FIG. 3;

FIG. 10 is a side view of FIG. 3\'s AIOL assembly prior to assembly;

FIG. 11 is a side view of FIG. 3\'s AIOL assembly at its most posterior axial stopping position;

FIG. 12 is a side view of FIG. 3\'s AIOL assembly at an intermediate axial stopping position;



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Pre-loaded iol insertion system
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Industry Class:
Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor
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stats Patent Info
Application #
US 20130018461 A1
Publish Date
01/17/2013
Document #
13604172
File Date
09/05/2012
USPTO Class
623/637
Other USPTO Classes
International Class
61F2/16
Drawings
17


Elective
Implant
Implantation
Intraocular
Intraocular Lens
Ocular
Optic
Flatten
Ocular Lens
Optical


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